1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.app; 18 19 import android.compat.Compatibility; 20 import android.os.Process; 21 22 import com.android.internal.compat.ChangeReporter; 23 24 import java.util.Arrays; 25 26 /** 27 * App process implementation of the {@link Compatibility} API. 28 * 29 * @hide 30 */ 31 public final class AppCompatCallbacks implements Compatibility.BehaviorChangeDelegate { 32 private final long[] mDisabledChanges; 33 private final ChangeReporter mChangeReporter; 34 35 /** 36 * Install this class into the current process. 37 * 38 * @param disabledChanges Set of compatibility changes that are disabled for this process. 39 */ install(long[] disabledChanges)40 public static void install(long[] disabledChanges) { 41 Compatibility.setBehaviorChangeDelegate(new AppCompatCallbacks(disabledChanges)); 42 } 43 AppCompatCallbacks(long[] disabledChanges)44 private AppCompatCallbacks(long[] disabledChanges) { 45 mDisabledChanges = Arrays.copyOf(disabledChanges, disabledChanges.length); 46 Arrays.sort(mDisabledChanges); 47 mChangeReporter = new ChangeReporter( 48 ChangeReporter.SOURCE_APP_PROCESS); 49 } 50 onChangeReported(long changeId)51 public void onChangeReported(long changeId) { 52 reportChange(changeId, ChangeReporter.STATE_LOGGED); 53 } 54 isChangeEnabled(long changeId)55 public boolean isChangeEnabled(long changeId) { 56 if (Arrays.binarySearch(mDisabledChanges, changeId) < 0) { 57 // Not present in the disabled array 58 reportChange(changeId, ChangeReporter.STATE_ENABLED); 59 return true; 60 } 61 reportChange(changeId, ChangeReporter.STATE_DISABLED); 62 return false; 63 } 64 reportChange(long changeId, int state)65 private void reportChange(long changeId, int state) { 66 int uid = Process.myUid(); 67 mChangeReporter.reportChange(uid, changeId, state); 68 } 69 70 } 71